If this is any help, here is the installation log (/var/log/apt/history.log) from the package upgrade that changed the config file:
Start-Date: 2012-07-20 06:39:28 Commandline: apt-get -qq -y upgrade Upgrade: postfix:amd64 (2.9.1-5, 2.9.3-2~12.04.1) End-Date: 2012-07-20 06:39:31 This is not an issue with puppet, as puppet was not involved in the package upgrade at all. The upgrade was done by a nightly cron job that uses only apt-get. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1027061 Title: Postfix upgrade to 2.9.3-2~12.04.1 changes configuration files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/puppet/+bug/1027061/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs